Suzuki VZR1800 2007 Service Manual page 237

5-36 FI SYSTEM DIAGNOSIS
Step 3
1) Turn the ignition switch OFF.
2) Remove the IAP sensor. (#6-13)
3) Connect the vacuum pump gauge to the vacuum port of the
IAP sensor.
4) Arrange 3 new 1.5 V batteries in series 1 (check that total -
voltage is 4.5 – 5.0 V) and connect - terminal to the ground -
terminal 2 and + terminal to the VCC terminal 3.
5) Check the voltage between Vout terminal 4 and ground 2.
Also, check if voltage reduces when vacuum is applied up to
400 mmHg by using vacuum pump gauge. (#5-40)
! 09917-47011: Vacuum pump gauge
09900-25008: Multi-circuit tester set
& Tester knob indication: Voltage (')
Is the voltage OK?
• Red, P/B or B/Br wire open or shorted to
ground, or poor A, P or S connection (#2)
• G/B, Red or B/Br wire open or shorted to
ground, or poor 9, A or S connection (#1)
• If wire and connection are OK, intermittent trou-
YES
ble or faulty ECM.
• Recheck each terminal and wire harness for
open circuit and poor connection.
• Replace the ECM with a known good one, and
inspect it again.
If check result is not satisfactory, replace the IAP
NO
sensor with a new one.
6) After repairing the trouble, clear the DTC using SDS tool.
(#5-26)
3
3
ECM coupler (Harness side)
(Black) (Gray)